Freelancer Oleksandr Chernykh (linux & Unix, windows) ≡ sashkets

• setup and maintenance of the portal 24/7 • organization of a corporate mailing list server (one mailing list can be up to 250,000 subscribers). Sending speed 10000 emails per minute #administration #sysadmin #mail #Windwos #linux #freebsd #mail…

0 211

Domain controller without Windows

Software & Server Configuration

• Set up the domain controller on Samba • Configured remote user management for the domain • Implemented Roaming Profiles for user convenience • Set up remote user administration This solution saved the company $1200 on purchasing a Windows…

0 924

and MEDOC. Migration to PostgreSQL Database

Software & Server Configuration

I made the transition from the FireBird BD to PostgreSQL thanks to which MEDOC started to work faster #Administration #Sissadmin #Post #Windwos #linux #freebsd #mail #postfix #MySQL #mariadb #terminal #nginx

0 193

Backup and recovery of MEDOC using PostgreSQL tools

Databases & SQL

Who has been using MEDCOM for a long time knows that there is not always an opportunity to restore from a backup using standard tools (as it was after updating to version 11.02.144). Therefore, it is also good to make backups using database tools and…

0 164

Cloning ESXi flash drive online

System & Network Administration

The flash drive device is not completely reliable, especially if it is constantly running. After installing VMware ESXi on the flash drive and configuring vSphere, virtual machines, etc., it is highly, highly recommended to clone it or at least…

0 134

Blocking temporary email addresses

Software & Server Configuration

It is known that there are services that provide the opportunity to obtain a temporary email address for free for user web-cabinet registration purposes. Over time, these addresses become invalid, and subsequent mailings to clients of the portal with…

0 149

Solved the bounce loop or reply looping problem

Software & Server Configuration

The organization sends informational messages (advertisements, promotions, news, etc.) to its subscribers. All subscribers validated their emails during the user account registration process. All messages are received through a separate mail server…

0 193

Mailing server

Software & Server Configuration

Configured the corporate portal email newsletter server. One newsletter can reach up to 250,000 subscribers. Sending speed is 10,000 emails per minute. Number of newsletters is 3-5 within a working day. The mailing log is recorded in the database for…

0 189

Mail routing

Software & Server Configuration

To prevent blocking of the server address from which mailings are sent in various blacklists, I configured mail routing through different interfaces (IP addresses) of the mail server #administration #sysadmin #mail #Windows #linux #freebsd #mail #…

0 201

SHADOW mode for unprivileged user on WIN-server

Software & Server Configuration

Gave the ability for a non-privileged user to connect to other users' terminal sessions (shadow mode) #administration #sysadmin #mail #Windows #linux #freebsd #mail #postfix #MySQL #mariadb #terminal #nginx

Total projects:

1

0 arbitrations

Average rating:

5.0

1 review

5.0

Professionalism

5.0

Quality

5.0

Price

5.0

Contactability

5.0

Deadlines

Latest proposals 10

Project	Budget	Proposal	Deadline	Added
.mdb database recovery	Not specified	45 USD	1 day	22 Aug 2025
Transfer 1C from one computer to another	Not specified	34 USD	1 day	20 Aug 2025
Optimization of the website and server performance	Not specified	16 USD	1 day	19 Aug 2025
It is necessary to identify and resolve the issue of increased CPU usage on the server.	22 USD	16 USD	1 day	19 Aug 2025
Set up a server for Laravel	Not specified	225 USD	7 days	7 Aug 2025
Пробросить usb порт с linux на windows	Not specified	22 USD	1 day	3 Aug 2025
554 5.7.1 : Relay access denied	18 USD	18 USD	1 day	31 Jul 2025
Configure MX Mail Records	31 USD	18 USD	1 day	30 Jul 2025
Setting up Remote Desktop services VDS	50 USD	50 USD	1 day	27 Jul 2025
Website translation to SSL	Not specified	25 USD	1 day	27 Jul 2025

.mdb база даних відновлення

Status Project expired

Type Public project

Budget Not specified

Proposal 45 USD

Deadline 1 day

Added 22 August 2025

Перенос 1С з одного компютера на другий

Status Project expired

Type Public project

Budget Not specified

Proposal 34 USD

Deadline 1 day

Added 20 August 2025

Оптимізація роботи сайті та серверу

Status Project expired

Type Public project

Budget Not specified

Proposal 16 USD

Deadline 1 day

Added 19 August 2025

Потрібно виявити та усунути проблему зростання використання CPU на сервері

Status Suspended by administration

Type Public project

Budget 22 USD

Proposal 16 USD

Deadline 1 day

Added 19 August 2025

Налаштувати сервер під Laravel

Status Project expired

Type Public project

Budget Not specified

Proposal 225 USD

Deadline 7 days

Added 7 August 2025

Пробросить usb порт с linux на windows

Status Closed without completion

Type Public project

Budget Not specified

Proposal 22 USD

Deadline 1 day

Added 3 August 2025

554 5.7.1 : Relay access denied

Status Project complete

Type Public project

Budget 18 USD

Proposal 18 USD

Deadline 1 day

Added 31 July 2025

Настроить MX Записи почты

Status Project complete

Type Public project

Budget 31 USD

Proposal 18 USD

Deadline 1 day

Added 30 July 2025

Настройка Remote Desctop services VDS

Status Closed without completion

Type Public project

Budget 50 USD

Proposal 50 USD

Deadline 1 day

Added 27 July 2025

Перевод сайта на ssl

Status Project expired

Type Public project

Budget Not specified

Proposal 25 USD

Deadline 1 day

Added 27 July 2025

Oleksandr Chernykh
Lvov, Ukraine
1 0
Available for hire

Projects 1
Rating -
Rating 487

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Last project: 11 months back
Collaboration with clients: 1
Last visit: 6 months 23 days ago

Українська: Fluent
Русский: Fluent
English: Pre-Intermediate

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Windows

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One-time work on Windows

5.0

Oleksandr Chernykh

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Total projects:

1

Average rating:

5.0

5.0

5.0

5.0

5.0

5.0

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